[exotica_core] Fix instantiation of CollisionScene from Python tuple
[exotica_core] Fix instantiation of CollisionScene from Python tuple

The CollisionScene initialisers were not added to known initializer
types thus failing instantiation when loaded from a tuple in
exotica_python.

openhumanoids/exotica,openhumanoids/exotica,openhumanoids/exotica,openhumanoids/exotica